Fireproof and waterproof composition.



UNITED STATES PATENT @FFICE.

FIREPROOF AND WATERPROOF COM POSITION.

Specification of Letters Patent.

Patented March 27, 1906.

Application filed July 16, 1903. Renewed August 12, 1905. Serial No.274,014.

To rill whom it Wmy concern:

Be it known that I, EDWARD CovINGToN, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake and State ofUtah, have invented new and useful Improvements in Fireproof andl/Vaterproof use, the composition being ordinarily placed upon themarket in sacks, bags, or similar receptacles.

The composition is ordinarily placed upon the market in four differentgrades, grade 1 being the finest and grade 4 the coarsest. Grade No. 1is mixed with water and brought to the consistency of plaster andapplied with a trowel. When dry, it forms a cement and is well adaptedfor use in connection with safety vaults and fireproof buildings. It mayalso be used for roofing and floors, being both fire and water proof andnon-heat conducting. Grade No. 2 is combined with pitch or itsequivalent. The pitch is spread over the surface to be covered ortreated, and the composition is'then sifted over the pitch, adheringthereto and forming a fire and water proof coating. Grades Nos. 3 and 4,

which are coarser, are applied in the same manner as grade No. 2 and areespecially designed for the protection of iron, wood, water and gaspipes, bridge-timbers, warehouses, water flumes, powder magazines,docks, wharves, piles, pier-timbers, and the like, rendering the samefire and water proof.

In grade No. 1 the ingredients are mixed with water and combined inabout the fol lowing proportions: mica, fifty per cent; burnt gypsum,twenty-five per cent; silica, fifteen per cent; graphite, five per cent;mica-schist, five per cent.

In grade No. 2 the ingredients are combined with pitch or its equivalentin about the following proportions: mica, seventyfive per cent; silica,ten per cent. graphite, ten percent. mica-schist, five per cent.

In grades Nos. 3 and 4, which are combined with pitch or its equivalent,the ingredients are combined in about the following prop ortions:micaschist, forty per cent. mica, thirty per cent. silica, twenty percent. graphite, ten per cent.

What I claim, and desire to secure by Letters Patent, is

The herein-described composition of matter consisting of burnt gypsum,mica, silica, gra hite and mica schist, substantially as am: for thepurpose specified.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD COVINGTON.

Witnesses:

THOMAS H. JENKINS, ERNEST H. COLE.

